Appcues for Product Adoption - Make your product easier to use. Code-free.
UI Garage - Specific mobile and web design patterns for your inspiration
Usetiful - Fight user churn with great user onboarding. Interactive product tours and smart tips significantly improve your user retention.
Muzli - UI/UX and Design Inspiration Chrome Extension
UserGuiding - User onboarding made easy, for less. Create product walkthroughs in a couple of clicks, without breaking the bank.
Design Hunt - Curated design inspiration for everyone